Double Insulation In Attic

Some attic floors that already have a layer of insulation could benefit from an additional application over the existing layer.

Double insulation in attic.

Now here s a situation where a homeowner what looks like many years ago added insulation they added a three inch layer but. Both can be added to uninsulated attics or layered over existing material. An r 1 1 is provided from the product itself for the reflective double bubble material. Don t compress insulation or double it over.

So it s time to pay close attention to what s happening up there. If you don t provide air space this product provides almost no insulating value. Once you ve filled a space with roll or batt insulation fluff it to its full expansion by pulling it forward to fill the cavity. Insulation expands quickly when you open the packaging.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. In attic spaces an additional layer of un faced insulation usually r 30 can be installed on top of the insulation that is between the ceiling joists for an added layer of protection. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Loose fill or batt the common term for blanket insulation.

The rubber meets the road on reflectix s website where it says no air space no reflective insulation benefit. Folding and compressing the material changes the r value. I ve always said adding insulation to your attic is some of the best money you can spend to make your house more energy efficient but whether to use faced or unfaced insulation is a great question. Improper installation can damage attic framing promote mold.

The extra batting increases r values so it further slows warm air. Share this story via email. A tip for doubling up on attic insulation. For diy attic insulation you ve got two choices.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs. In really cold climates a third layer of insulation either un faced r 30 or blown in cellulose can be installed on top of the first two layers.